Perhaps you should try some spelling variations:
hieu vien » hieu hien, hieu viec, thieu nien
thu sach » tu sach, thuat sach, thuoc sach
sach tri » sach tai, sach tren, sach truc
tri nang » thi nang, tra nang, tri bang
vien cap » vien cac, vien cao, vien can
cap nuoc » dat nuoc
mai hoi » mai khoi, lai hoi, mai doi
dai hoi » dai hoc, dai hai, dai moi
lai hoa » dai hoa, loai hoc
va hanh » van hanh, va thanh, va danh
vi cua » vai cua, di cua

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach tri nang ((((mai hoi) or (dai hoi))) or (lai hoa)). hieu vien cap nuoc va hanh vi cua vat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach tri nang ((((mai hoi) OR (dai hoi))) OR (lai hoa)). hieu vien cap nuoc va hanh vi cua vat.
• Adding a wildcard symbol may retrieve word variants: thu sach tri nang ((((mai hoi) or (dai hoi))) or (lai hoa)). hieu vien cap nuoc va hanh vi cua vat*.